hexi ehxi hxei xhei exhi xehi heix ehix hiex ihex eihx iehx hxie xhie hixe ihxe xihe ixhe exih xeih eixh iexh xieh ixeh
Note: these 'words' (valid or invalid) are all the permutations of the word hexi. These words are obtained by scrambling the letters in hexi.